// vim: filetype=cpp
#include <iostream>
#include <map>
#include <sstream>
#include <string>
#include <vector>

#include "config.hpp"
#include "tclap/CmdLine.h"
#include "nlohmann/json.hpp"

#include "bottles.hpp"
#include "cellar.hpp"
#include "commands.hpp"
#include "output.hpp"
#include "version.hpp"

/*[[[cog
     import cog

     with open("src/modules.txt") as modules:
        for module in modules:
            cog.outl("#include \"internal/{0}.hpp\"".format(module.strip()))
  ]]]*/
//[[[end]]]

using namespace std;
using namespace cellar;
using json = nlohmann::json;

bool cellar::dryrun;
bool cellar::verbose;

bottles::Bottle cellar::bottles::active_bottle;

void cellar::print_header() {
    output::statement("cellar - bottle management tool for WINE connoisseurs");
    output::statement(version::short_version());
}

int main(int argc, char* argv[]) {
    output::detect_colors();
    if (argc == 1) {
        print_header();
        cout << "\n(try \"cellar help\" if you're confused)" << endl;
        return 0;
    }
    try {
        const string desc = "bottle management tool for WINE connoisseurs";
        const string versionstr = version::short_version();
        TCLAP::CmdLine cmdparse(desc, ' ', versionstr, false);

        TCLAP::ValueArg<string> bottlearg("b", "bottle", "Use a wine bottle other than the one at ~/.wine", false, "", "bottle");
        cmdparse.add(bottlearg);
        
        TCLAP::SwitchArg dryrunarg("d", "dry-run", "Doesn't actually do anything");
        cmdparse.add(dryrunarg);
        
        TCLAP::SwitchArg verbosearg("v", "verbose", "Enables extra output");
        cmdparse.add(verbosearg);
        
        TCLAP::UnlabeledValueArg<string> command("command", "Specific command to run.", true, "help", "command");
        cmdparse.add(command);

        TCLAP::UnlabeledMultiArg<string> subargs("subargs", "Sub-arguments", false, "", "subarg");
        cmdparse.add(subargs);

        cmdparse.parse(argc, argv);

        dryrun = dryrunarg.getValue();
        verbose = dryrun || verbosearg.getValue();

        // BULLSHIT: trying to use str.format on this string causes bizarre compiler errors
        /*[[[cog
             import cog

             with open("src/modules.txt") as modules:
                for module in modules:
                    cog.out("""
                        for (auto item : commands::""" + module.strip() + """_commands()) {
                            commands::command_map[item.first] = item.second;
                        }
                    """, dedent=True, trimblanklines=True)
          ]]]*/
        //[[[end]]]
        
        bool set_environment = true;
        if (!bottlearg.isSet()) { // argument not passed
            if (getenv("WINEPREFIX")) {
                string env_wineprefix = getenv("WINEPREFIX");
                output::warning("cellar was designed to handle WINEPREFIX for you with the -b argument");
                output::warning("WINEPREFIX will be respected for consistency");
                bottles::active_bottle = bottles::Bottle(env_wineprefix);
            } else {
                string homepath = getenv("HOME");
                string fullbottlepath = homepath + "/.wine";
                bottles::active_bottle = bottles::Bottle(fullbottlepath);
            }

            set_environment = false;
        } else {
            string bottlechoice = bottlearg.getValue();
            if (bottlechoice.substr(0,1) == "/" || bottlechoice.substr(0,1) == ".") { // absolute or relative path
                bottles::active_bottle = bottles::Bottle(bottlechoice);
            } else if (bottlechoice.substr(0,1) == "~") { // "absolute" path in home directory, not expanded by the shell for some reason (i've seen some shit)
                // this is a naive replacement and will fail if the user tries something like ~nick/.wine
                // i'm figuring at that point if you're doing that, you'll also recognize if your shell
                // isn't actually expanding your path...
                bottlechoice.replace(0,1,getenv("HOME"));
                // or at least you'll think to use verbose mode to make sure it's loading the right directory
                output::warning("your shell didn't expand your given path properly, doing a naive replacement", true);
                bottles::active_bottle = bottles::Bottle(bottlechoice);
            } else {
                if (bottlechoice.substr(0,6) == ".wine.") {
                    output::statement("tip: cellar can add the \".wine.\" prefix automatically");
                    bottlechoice.replace(0,6,"");
                }
               
                string homepath = getenv("HOME");
                string fullbottlepath = homepath + "/.wine." + bottlechoice;
                bottles::active_bottle = bottles::Bottle(fullbottlepath);
            }
        }

        bottles::active_bottle.load_config();

        if (set_environment) {
            output::statement("WINEPREFIX=" + bottles::active_bottle.path, true);
            setenv("WINEPREFIX", bottles::active_bottle.path.c_str(), 1);
        }

        string usercmd = command.getValue();
        if (commands::command_map.count(usercmd) > 0) {
            vector<string> subargv;
            stringstream sstr;
            sstr << "cellar ";
            sstr << usercmd;
            subargv.push_back(sstr.str());
            for (auto item : subargs.getValue()) {
                subargv.push_back(item);
            }
            commands::command_map[usercmd](subargv.size(), subargv);
        } else {
            stringstream errstr;

            errstr << "invalid command: " << usercmd;
            output::error(errstr.str());
            return 1;
        }
        return 0;
    } catch (TCLAP::ArgException &exc) {
        cerr << "Invalid argument. (" << exc.argId() << ": " << exc.error() << ")" << endl;
        return 1;
    }
}